#include <exception>
#include <string>

struct MyException :std::exception {
 const char* data{};
 MyException(const char* s) :data(s) { puts("MyException()"); }
 ~MyException() { puts("~MyException()"); }
 const char* what()const noexcept { return data; }
};
void f2() {
 throw new MyException("new Exception异常....");
}
int main(){
    try{
    f2();
}catch(MyException* e){
    puts(e->data);
}
}